I would update your server and have a read through this.
In your port forward settings only use TCP not UDP
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Sicherheitswarnung Internetanbieter | 2 | 447 | March 3, 2020 | |
| PLEX stopped being detected on TV | 0 | 69 | February 18, 2021 | |
| REPORT! SlyPlex | 48 | 201 | December 1, 2016 | |
| The thread detection in my firewall is reporting increase in potential threat on my public Plex port | 8 | 189 | January 5, 2022 | |
| Plex opens random UDP port numbers that change with each restart, and I see UFW packet denies | 13 | 150 | May 29, 2023 |